# Access & Security Groups

- [User Groups](/stronghold/access-and-security-groups/user-groups.md): The section below describes how user groups are implemented in Stronghold. Note that the term "tenant" is used throughout; this refers a group, lab, or center's Stronghold instance.
- [Lifespan Staff Access](/stronghold/access-and-security-groups/lifespan-staff-access.md): The following instructions are for authorized Lifespan staff attempting to access Stronghold workstations without the use of Brown's VPN